Get the adapter type information from Android OS.

talk/app/webrtc/java/android/org/webrtc/NetworkMonitor.java

Index: talk/app/webrtc/java/android/org/webrtc/NetworkMonitor.java
diff --git a/talk/app/webrtc/java/android/org/webrtc/NetworkMonitor.java b/talk/app/webrtc/java/android/org/webrtc/NetworkMonitor.java
index 0f3df42fbd64f1da81ccdb5e221b1fbbe8dbc74d..01dfa6416bca2c136591c66c8178887d27cac852 100644
--- a/talk/app/webrtc/java/android/org/webrtc/NetworkMonitor.java
+++ b/talk/app/webrtc/java/android/org/webrtc/NetworkMonitor.java
@@ -131,6 +131,14 @@ public class NetworkMonitor {
     nativeNetworkObservers.remove(nativeObserver);
   }
 
+  // Called by the native code.
+  private NetworkInformation[] getAllNetworkInfos() {
+    if (autoDetector == null) {
+      return new NetworkInformation[0];
+    }
+    return autoDetector.getAllNetworkInfos();
+  }
+
   private ConnectionType getCurrentConnectionType() {
     return currentConnectionType;
   }